Hannora e



T. V. ALMS. DECU. n. a. MUS, ADHINISTRATRIX. SHEET MID TIN MILL FURNACE.

Patentd Oct. 14;, 19M

2 SHEETSSHEET l- UNITED STATES PATENT OFFICE.

THONAS V. ALLIS, OF PITTSBURGH, PENNSYLVANIA; HANNORA E. ALL IS ADMINISTRA- Tam r SAID THOMAS v. AI". LIs. DECEASED.

SHEET AND TIN MILL FURNACE.

Specification of Letters Patent.

Patented Oct. 14, 1919.

To 1/ whom it I/mj/ oli /"1'11:

Be it known that l. 'lnonas Anus, a

citizen of the l nited States of .\|nerica, re-

siding at Pittsburgh. in the county of Allegheny and State of lcmisvlvanla, have inventcd certain new and useful lmprovements'in Sheet and 'lin, Mill Furnaces, of

arrangen'ient of-a coiiitinuous pair heating furnace, a. sheet or intermed ate 'reheatmg furnace, and independent fire boxes foreach furnace, all contained in a unitary structure, whereby valuable floor space is economized, and the operation of the various parts aforesaid is facilitated.

In the accompanying drawings forming part of this specification,

Figure l is a sectional plan view of the unitary structure.

Fig.2'is an elevation line IT-II of Fig. 1.

Figs. 3 and 4 are sectional elevations on planes indicated respectively by the lines TIIIIT, and IV-IV' of Fig. 1.

In the practice of nay-invention the chamber 1 for heating the bars. and the chamber 2 for the intermediate reheating are formed in a unitary structure. but are separated,

partly in section on the one from the other by a partition wall 3..

Tt preferred to employ for heating the bars a continuous type of furnace in which the bars after being admitted through the charging door 4*, are fed through the heat ing chamber by being pushed forward from the rearend to a point accessible through the discharge door 4.

The sheet furnace is provided with an opening and door 5 on the same side of the unitary structure as the discharge door for the bar furnace as shown in Fig. 1, and the partially reduced sheets are charged into and removed from the furnace through this door 5.

It i custon'iary to reheat and 'ber 1.

As the partially reduced sheets will oc-- cupy considerably n'iore space than the sheet or tin bars, the chamber 2 is made substantially wider than the chamber 1 employed for heating the bars.

But as the bars are charged into the barfurnace cold. the chamber 1 is made substantially longer than the chamber 2, thereby providing a sullicient length of travel of the bars to insure their being properly heated. width toward its discharge end, than at its charging end to provide space for manipulating the bars.

'lhegreatcr width of chamber 2 permits the placing oi the lire boxes or combustion char-nbers ti. and 7, in the rear of said chamber and the greater length of'lhe chamber 1 permit of the fire boxes being made of snllici'cnt depth, -\\f|thout extending the verti al plane of the rear cnd of the chamber 1. "i lfl. fire box (3 which arranged on the opposite side of the partition wall 3 from the chamher 1, is connected to said chamber adjacent to its rear end by an opening 8 Fig. 3,

through partition 3 the portion 9 of such The chamber :1 is made of grcatcr partition below the opening forming them bridge wall over which the products dt'eombustion pass into the rear end of the cham- For convenience of illustration the opening 8 in the partition 3 is shown by dotted lines in Fig. 1. Products of combustion escape from chamber 1 through a flue 10 Fig. 3, located adjacentto the front or discharge end of the chamber, said flue be. ing connectedto a passage 11, which in turn connnunicates with a stack 11.

The'products of combustion flow from the fire box ,7 over the bridge wall. 12 into the chamber 2, and escape therefrom through the vertical ports 13, 13, located on opposite sides of the chamber. adjacent to 'the front end thereof, and thence to a, stack (not shown). As the tire .box 7 is located to one side of the ehai'nber 2. the side wall of the" opening 14, above the bridge though other forms of fuel may be employed by adapting th firetboxes thereto. It is characteristic of my improvement that the, tire boxes are located closely adjacent to' each other, thus facilitating the handling of fuel, especially when coal is used. and this desirable result is attained without intertering wit-h charging bars into the rear end ot'the, chamber 1 The bars being charged into the bar furnace at its rear end, the space between the front of said furnace and the train of rolls used in reducing the bars.

is left tree tor the manipulation of the metal in such process ot reduction.

I claim herein as my invention:

1. in a unitary structure. the combination ot a continuous pair heating turnace and a sheet heating furnace. the pair turnaee pro vided with receiving and discharging doors at opposite ends, a tire 'bOX located at one side of its receiving end and partially in the rear ot the sheet turnace, the sheet t'urnace provided with a tire box located wholly at its rear and adjacent to the pair furnace, tire box.

2. In a unitary structure, the combination of a continuou pair heating furnace and a sheet heating furnace. the pair turnace provided with receiving and discharging doors at opposite ends a tire box located at one side of its receiving end and partially in the rear ot the sheet t'urnace. the sheet t'urnace provided with a tire box located wholly at its rear and adjacent to the pair furnace tire. box. the pair turnace being less in width at its charging end than to ard its discharging end.

3. In a unitary striwture. the combination of a continuous pair heating furnace and a sheet heating furnace, the pair furnace provided with receiving and discharging doors t opposite. ends the pair furnace being less in width at its chargingend than toward its discharging end, an independent fire boX connected to the pair furnace through an opening in its side wall at its charging end and a second independent tire box connected to the sheet furnace through an opening in its rear wall, said fire boxes being located in the rear of the sheet furnace, at one side of the pair furnace and adjacent to each other.

l. in a unitary structure. the combination of two heating chambers provided at their trout ends with doors for the removal of the heated articles. and independent fire boxes for said chambers arranged in the rear and within planes coincident, with the side walls ot one of said chambers.

.3. In a unitary structure, the combination of two heating chambers, provided at their tront ends with doors for the removal. of the heated articles, and one of the chambers provided with a charging opening at its rear end. and independent tire boxes for said chambers arranged in the rear end of one of the chambers, and at one side of the rear portion ot the other chzraber.

(i. In a unitary structure, the con'lbination of two heating chambers, provided at their trout ends with doors for the removal of the heated articles, and one of the chambers provided with a charging opening at its rear end; a tire box connected to the chamber having trout and rear openings through an opening in the side Wall of said chamber, and a second tire box connected to the other chamber through an opening in its rear wall.

in testimony whereof, I hereby ElfllX my signature, in the presence of two Witnesses.

THOMAS V. ALLIS.

\Yitnesses: I JonN F. SWEENY, RAYMOND J. GRAB. 

